Typewriting and code perforating machine



June 12, 1956 R. B. JOHNSON 2,749,985

TYPEWRITING AND CODE PERFORATING MACHINE Filed Dec. 21, 1951 4 Sheets-Sheet 1 INVENTOR REYNOLD B. JOHNSON ATTORNEY June 12, 1956 JOHNSON TYPEWRITING AND CODE PERFORATING MACHINE 4 Sheets-Sheet 2 Filed Dec.

INVENTOR REYNOLD B. JOHNSON Why ATTORNEY June 12, 1956 R. B. JOHNSON TYPEWRITING AND CODE PERFORATING MACHINE 4 Sheets-Sheet 3 Filed Dec.

INVENTOR REYNOLD B. JOHNSON g vwt ATTORNEY June 12, 1956 R. B. JOHNSON 2,749,985

TYPEWRITING AND CODE PERFORATING MACHINE Filed Dec. 21, 1951 4 Sheets-Sheet 4 FIG.7.

/ F IG.10.

( QUANTITY PART NO. :3 1 co ,0 7 1 i} United States Patent TYPEWRITING AND CODE PERFGRATING MACI-HNE Reynold B. Johnson, Binghamton, N. Y., assignor to International Business Machines Corporation, New York, N Y., a corporation of New York Application December 21, 1951, Serial No. 262,811

13 Claims. (Cl. 164112) This invention relates to typewriting machines.

An object is to provide a typewriting machine which is capable of recording data not only in the conventional manner by printing characters representing the data, but also is capable of recording the data in a perforation code to enable the sheet on which the data is recorded to be subsequently placed in a reading machine which is capable of sensing the perforated code and translating it into a duplication of the data on another sheet or utilizing the data in machines which are capable of being controlled by perforated records in well known ways.

An object is to provide a novel means of recording data on a typewritten sheet.

An object is to provide a means of recording data by exceedingly fine perforations which are not readily visible to the eye so as not to detract from the legibility or the prominence of the printing characters, but nevertheless are capable of controlling perforated record equipment through a suitable sensing device for the perforations.

An object is to provide a typewriting machine with a code perforating mechanism which contemplates the use of needle-like perforating members.

An object is to provide a code perforating mechanism of the nature outlined above, in which the perforations are not made immediately but are stored long enough to permit the correction of errors which may arise in printing the characters.

An object is to provide a code perforating mechanism of the storage type in which the data is initially set up during one cycle of operation of the machine, as, for example, in printing a single character represented by code representations, and completing the perforating operation during the next succeeding cycle so that if an error is discovered in printing character, the error may be erased and reprinted correctly without the necessity for manually restoring or resetting any of the parts which store the code representations.

Other objects of the invention will be pointed out in the following description and claims and illustrated in the accompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, which has been contemplated, of applying that principle.

In the drawings:

Fig. 1 is a perspective view of a machine embodying the present invention.

Fig. 2 is a vertical section showing the printing mechanism the means for operating the perforating or piercing mechanism.

Fig. 3 is a large scale vertical section showing the platen and the relation of the code piercing mechanism thereto.

Fig. 4 is a vertical section through the common operating mechanism for the piercing and code storage mechanism.

Fig. 5 is an inclined section approximately on the line 5--5 in Fig. 1 and showing the piercing and storage mechanism on a large scale.

Fig. 6 is a perspective view showing the construction of the backing member and related parts for the code piercing mechanism.

Fig. 7 is a portion of a record sheet showing the relation of the code perforations to the characters re corded on the sheet.

Fig. 8 is a view similar to Fig. 4 and shows the means for restoring the storage device.

Fig. 9 is a "iew showing the key-controlled means for clearing the storage device after the last character is printed.

Fig. 10 is a detail view showing the spacing and code designations of the code punches with specific reference to the printed numeral 2.

The drawings show the invention as applied to a well known form of power operated typewriting machine which has been variously known as the Electromatic and International electric typewriter. Since this machine is now well known in the art, only a very brief description will be given which will be limited to such parts of the machine as are directly involved in the invention disclosed herein.

This machine comprises a base member it) (Figs. 1 and 2) on which is mounted the usual carriage 11 rotatably supporting a platen 12 in the usual way. The character keys 13 control power mechanism for actuating the typebars 14 (Fig. 2) which are pivoted on a fulcrum wire 15 mounted in the usual wire segment. The power to operate the machine is furnished by a suitable driving motor located in the housing 16a (Fig. 1) at the rear right-hand corner of the base 10-, the speed of which motor can be suitably regulated in a well known way to vary the blow of the typebars 14.

The motor drives a power roller 16 continually in the direction of the arrow (Fig. 2) while the machine is in use and for each key 13 and its related type bar 14, there is a power unit 17 commonly known as a cam unit in the art. These cam units are of well known construction and include a cam 17a which is controlled by the related key which is depressed to operatively engage the tread of the cam 17a with the power roller 16. The power units in each case are connected to the type bar through a link 13, a sub-lever 19, a link 20, and a toggle link 21. The-rotation of the cam 17a by the power roller causes the cam units 17 to be rocked so as to draw down the links 13 and thereby actuate the type bars 14 to the printing position, the type bar striking the work sheet 22 (Fig. 1) through the usual ribbon (not shown). The machine is equipped with the usual functional mechanisms of such a machine, such as carriage return, tabulating, back space, and shift mechanisms which are not involved in the present disclosure and therefore will not be described.

The present invention contemplates the provision of a piercing mechanism which will pierce the work sheet 22 with a group of perforations which represent the printed characters according to a code. For the purpose of explaining the piercing of the code, the sheet may be considered as having nine vertical index-point positions forming a column, the horizontal dimension of which corresponds to the width of a character, as indicated diagrammatically in Fig. 10 in which the code perforations for the numeral 2 appearing in Fig. 7 have been shown on a large scale to enable the code positions to be clearly identified. The lowest position is designated 1 in- Fig. 10 and the highest position 9.

The characters are coded in accordance with the following table:

Code

A1, 2, 6 S1, 3, 8 B-l, 3, 6 T-1, 4, 8 C1, 4, 6 U-l, 5, 8 D1, 5, 6 8 1-3-2, 3, 6 W2, 4, 8 F2, 4, 6 X2, 5, 8 G2, 5, 6 Y3, 4, 8 H-3, 4, 6 Z3, 5, 8 I3, 5, 6 1l, 2, 3 J']., 2, 7 1 4 K-1, 3, 7 4 L-1, 4, 7 5 M-'1, 5, 7 4 N2, 3, 7 62, 4, 5 -2, 4, 7 72, 3, P2, 5, 7 83, 4, 5 Q3, 4, 7 9-1, 3, 5 R3, 5, 7 04, 5, 6

column of index-point positions allocated to one character. These perforations are made by a piercing mechanism which is operated by the power roller 16.

Each group of code perforations is initially set up and stored at the time of the impact of the type bar 14 with the work sheet 22 but the actual piercing of the paper to represent the character printed does not take place until the next type bar for another character is operated and the carriage 12 has skipped to the next succeeding character space. For this purpose, there is provided a piercing block 23 (Figs. 1 and 5) which serves as a terminal piece and guide for nine pairs of piercing wires 24. At this point, it should be explained that two perforations are always made in each code or index-point position rather than a single perforation as a means of insuring that at least one perforation will be made where necessary in each index-point position. The piercing wires 24 are located inside of sheaths 25 (Fig. 4) like the sheaths of Bowden wires. The block 23 is supported on a channel shaped member 26 (Figs. 1 and 3) which is disposed parallel with the platen 12 and at its ends is supported by the brackets 27 fixed to the base of the machine.

The nine pairs of piercing wire assemblies, which for convenience of description may be termed Bowden wires hereinafter, bend to the right and downwardly (Fig. 1) to the base 10 adjacent the right-hand end of the keyboard at which point the sheaths of the Bowden wires are secured to a bracket 10b fixed to the base 16. A second bracket 100 is secured to base 10 and the horizontal aim of bracket 10a (Figs. 1 and 4). The base 10 also is provided with a bearing bracket 28 on which is journalled one end of an operating shaft 29 which extends into the interior of the base 10 (Fig. 2) and is journalled in a suitable frame plate 30 fixed to the base 10.

Fixed to the shaft 29 is a pair of arms 31 (Fig. 4) supporting a stub shaft 32 on which are loosely pivoted ten levers 33, 33a, 331). There is a lever 33 for each of the eight code positions, one 33a for the ninth code position, and a restoring lever 33b. The pair of piercing wires 24 for each code position is fixed to the lefthand end (Fig. 4) of one of the levers 33 so that if any lever 33 is rocked clockwise on the shaft 32, the pair of piercing wires 24 associated therewith will be propelled upwardly. The ends of the wires 24 which project from the block 23 are sharpened so as to readily pierce the work sheet 22 when the levers 33 are actuated, as described.

The levers 33 are actuated by the mechanism which drives the shaft 29 but are controlled through a second series of Bowden wires 34 (Figs. 1, 3, 4, 5, 6, and 8) constructed like the Bowden wires 25, each having a wire 35. However, there is only one Bowden wire assembly 34 and wire 35 for each of levers 33 (Fig. 4), and a wire 35a for the lever 33b (Fig. 8). The ends of such wires are fixed to the right-hand arms (Fig. 4) of the levers 33, 3312.

Each of the levers 33 is provided with a pair of lugs 33c and a lug 33d which are disposed differently on the three kinds of levers 33, 33a, and 33b. The levers 33 for operating the code piercing wires have only the lugs 330 located on the undersides of both arms of the levers 33, as shown in Fig. 4. The levers 33a and 33b (Fig. 4) for the restoring wire 35a and the 9th position piercing wires are provided not only with lugs 330 but with a single lug 33d. As best shown in Fig. 8, the lugs 330. project upwardly into engagement with the arm 26 of racket 27 and the levers 33a, 33b differ only in that the lug 33d for lever 33b is located to the left of the shaft 32 (Fig. 8) whereas the lug 33d for the lever 33a is located on the right of said shaft and the lengths of the lugs 33d and the lugs 33c which are on the same arms are of sufficient lengths to compel the restoring lever 33b and the lever 33a for the 9th position piercing wires to rock on the shaft 32 counterclockwise and clockwise, respectively, when the shaft 32 moves upwardly toward the arm 26 of bracket 27. The lugs 330 for lever 33 normally are in engagement with the bracket 27 so that normally the levers 33, 33a, 33b are prevented from rocking the shaft 32.

It is evident in Fig. 4 that if any of the wires 35 are blocked against movement while the shaft 32 is moving upwardly, the levers 33 associated therewith will be rocked clockwise and the corresponding pair of wires 24 associated with a code position will be pushed upwardly and cause the piercing of the paper. The lever 33a for the ninth position is also invariably operative in the same way to push up the pair of wires 24 for the ninth position since lug 33d thereon will block the right-hand end against movement and compel lever 33a to rock clockwise.

Secured to the cross bar 26 is a block 36 (Figs. 1, 3, and 5) in which is mounted the shaft 37. Journaled on the shaft 37 are eight sensing levers 38 having three arms one arm 38a of which projects exteriorly of the block 36 into the path of code lugs 14a on extensions 14]) carried by the type bars 14. These extensions may take the form of short plates or arms which are soldered or otherwise fixed to the type bars 14 and are cut away transversely to form the code lugs 14a in accordance with the above code. In Fig. 2, the first lug 14a on the left corresponds to the first or lowest index-point position (Fig. 10) and the other two to the 3 and 4 positions. Thus the type bar in Fig. 2 effects the printing and piercing of the numeral "2 since it has lugs in the l, 3, and 5 positions. The type bar shown in Fig. 3 carries the code representations 1, 5, and 6 for printing and piercing the letter D.

One arm 38b (Fig. 5) of each lever 38 is engaged by a prong 39 of a comb spring secured to the block 36. The third arm 380 of each lever 38 has a latch projection 380 coacting with a latch lever 4t) slidably pivoted on a short shaft 41 carried by the block 36. The latches 40 are urged in a counterclockwise direction by the prongs 42 of a comb spring carried by the block 36. The latches 40 have a stop lug 46a which with the body of the latch forms a notch normally receiving the latch projection 38d. The third arm 380 of each of the levers 38 also has a stop lug 38e formed therein.

The Bowden wires 34 are secured to a plate 35:: (Fig. 5) which is secured to the block 36 with the wires 35 so located as to be capable of passing the stop lugs 38e when the levers 38 are in the position shown in Fig. 5, and with wire 35a located to be capable of operating a release bail 43 pivoted on a short shaft 44 carried by the 5 block 36. The latches 40 are slidably mounted on the pivot 41 by virtue of the fact that they are provided with short slots instead of round holes through which the shaft 41 projects and a prong 42a on a comb spring urges each latch downwardly toward the left in Fig. 5.

When a type bar 14 moves into the striking position shown in solid lines in Figs. 3 and 5, the lugs 14a on the extension 14b engage the arms 38a and rock in a clockwise direction (Fig. 5) such levers 38 as there is provided a corresponding lug on the extension 1412. This releases the related latches 4%, allowing the prongs 42 to urge the latches slightly counterclockwise into engagement with an edge 43a of the bail 43 and at the same time the related spring prong 42a thrusts the latch downwardly and to the left so that the free end of the latch comes into engagement with the right-hand face of the latch projection 38a and holds the related lever 38 in the actuated position. For the moment, it is assumed that all of the wires 35 are retracted to permit the lug 38d freely to pass to the left into the path of the related wire 35. When the lug 38s is so positioned in respect to any wire 35, the latter will be incapable of moving upwardly and therefore will block the right-hand end of the related lever 33 so that the subsequent rocking of the shaft 29 will project the associated pair of piercing wires 24 upwardly and cause a pair of holes to be pierced in the associated index-point position on the work sheet.

For the purpose of operating the shaft 29, there is provided the mechanism shown in Fig. 2. Fixed to the shaft 45 is an arm 46 which extends downwardly and to the left to a point adjacent the power roller 16. The end of the arm 46 has pivoted thereto at 46: a double lobed cam element 47 which is smaller but somewhat similar in profile to the cam elements 17a. The pivot 46a is fixed t the cam element 47 and the pivot 46a is provided with two flats corresponding to the lobes of the cam element 47 which flats are engaged by a leaf spring 48, the other end of which is secured to the arm 46 so as to normally hold the cam element in the position shown in Fig. 2.

Secured to the shaft 45 is the arm 49 (Fig. 2) which extends horizontally to the right and at its free end engages in a notch 50a formed in a lever This lever 50 is urged in a counterclockwise direction by a spring 51 so that the second arm of the lever 50 engages 2. lug 520 on a sector plate 52 secured to shaft 29. The sector plate 52 is connected to the arm 49 by a spring 54 which tends to hold the sector plate 52 with the lug 52a in engagement with the second arm of lever 50. The sector plate is also provided with a lug 52b. The shaft 45 and the arms 46, 49 are urged in a clockwise direction by a spring 55 anchored to the arm 49 and to a pin carried by the plate 30.

The lever 50 is pivoted at 30a on the plate 30 and this also serves as a pivot for a latch arm 56, a spring 57 urging the latch lever 56 in a counterclockwise direction to engage a tooth 56a thereon with a latch projection formed in the sector 52 immediately above the lug 52b. The latch lever 56 is controlled by a release lever 58 which is pivotally mounted at 59a on a horizontal arm 59 pivoted at 60. The upper arm of the lever 53 is connected by a link 61 to an arm 62 secured to the shaft to which is fixed the usual universal bar 63 for operating the ribbon feeding mechanism of the typewriter. The universal bar 63, for this purpose, is engaged by arms 1% formed in the levers 19.

It is clear that during the course of the operation of the type bar 14, the arm 62 will be rocked counterclockwise, drawing the link 61 to the left and rocking the release lever 58 counterclockwise to disengage the latch lever 56 from the latching projection in the sector 52. This allows the spring 54 to draw the sector plate 52 upwardly thereby rocking the shaft 29 counterclockwise and latch lever 50, clockwise to release the arm 49. Arms 46, 49 now rock clockwise and the cam element 47 will be moved into engagement with the power roller 16. The latter will rotate the cam element 47 clockwise by virtue of the contact of the lowermost lobe of the cam element with the power roller. The tread surface 47a of the cam lobe causes the lever comprising arms 49, 46 to be rocked counterclockwise to a position slightly beyond its initial position to ensure relatching of arm 49.

This movement of the arms 46, 49 to restore the arm 49 to the position shown in Fig. 2 retensions the springs 54, 55. The movement of the arms 46, 49 to engage the cam 47 with the power roller 16, effected by spring 55, causes the sector plate 52 to rock clockwise back to latching position. It is for this purpose that lug 52b is provided.

The object in having the sector plate 52 operated in both directions by the springs 54 and 55, respectively, is to obtain both a fast forward and a fast restoring stroke. These movements of the plate 52 take place in the short interval of time while the type bar is approaching the printing position and it is essential that the piercing of the paper be effected and that the wires 35 be restored before the lugs 14a engage any of the arms 38a (Fig. 5) of the levers 38. Thus, there is first a quick release of the sector plate 52, causing it to be rocked rapidly in a counterclockwise direction (Fig. 2) or a clockwise direction (Fig. 4) by the spring 54 driving into the paper 22 the piercing wires 24 for such levers 33 as have their wires blocked by lugs 38!: followed by a quick reverse movement of the sector plate under the influence of spring 55 which results in the withdrawal of all the wires 24, 35 and the restoring Wire 3501. 7

Each time the shaft 29 and the arms 31 rock clockwise in Fig. 4, the restoring lever 33b is rocked counterclockwise and the 9th position lever 33a is rocked clockwise thereby effecting the 9th position piercing with each operation of a type bar and at the same time actuating the restoring bail 43 upward. The relation of the wire 35a to the bail 43 is such that the bail 43 cannot be rocked clockwise in Fig. 5 far enough to release members 46! until the piercing wires 24 have engaged the paper. The retraction of the Wires 55 while the type bar is still approaching the printing point and is about to reach the position shown in Fig. 5 permits the levers 38 to take a new setting. The bail 43, when actuated by the wire 35a rocks the elements 40 clockwise on the pivot 41 and permits the latching projections 38d to snap under the end of the elements 44 into the notches formed by the lugs 4tia. The adjustment of the parts is such that before each type bar reaches the position shown in Fig. 5, there will be a free period in which the levers 38 will be fully restored.

Since the piercing wires for the 9th position are always operated regardless of whether or not there is any code representation stored in the mechanism shown in Fig. 5, the paper will always be pierced in the next adjacent column to the left of the first printed character, as shown in Fig. 7 where it will be noted that there are two perforations above and to the left of the printed numeral 2 in the Quantity and Part No. columns.

At the end or" a series of typing operations, as for example, to write a simple amount as shown in Fig. 7, the last character will be printed but the code representations therefor will be stored in the mechanism shown in Fig. 5 and represented by a combination of settings of the levers 38. It is necessary to perform a spacing operation to the next adjacent column on the right and then cause an operation of the mechanism disclosed in Fig. 2 to clear the code representations from the mechanism shown in Fig. 5 and pierce the paper. In order to accomplish this result, the machine may be modified as shown in Fig. 9 so that an operation of the usual space bar designated SE in Fig. 9, will cause an operation of the universal bar 63. The space bar SB normally controls a cam unit 17b similar to the cam unit 17 and, through a link 18a, operates a lever 64 which has the usual connections to the carriage escapement mechanism which need not be described herein since they are well known. For present purposes, the lever 64 may be formed with an extension 1% (Fig. 9) similar to the extensions 1.9a so that, whenever the space bar S3 is operated and the cam unit 17!) is operative to actuate the escapement mechanism in a well known way, the extension 1% will actuate the universal bar and effect the release of the latch 58 (Fig. 2) thereby causing the actuating mechanism for the piercing wires to be effective as described above. This will cause any code combination which may be stored in the mechanism of Fig. to be pierced directly above the last character printed on the work sheet in exactly the same fashion as if another type bar had been operated.

it might be desirable to have a spacing code representation pierced in the record sheet during the normal operation of the machine. This may be done by shaping the lever 64 like the levers w and providing a link 29, toggle 21, and a dummy type bar like 14 which has no type, but has an extension 14b like the type bars provided with lugs 14a representing a space code.

Cooperating with the piercing wires 24 is a backing member 65 (Figs. 1, 3, and 6) which is secured at its right-hand end to an arm 66 pivotally mounted at 67a on a frame comprising two bracket members 67b, 670, secured to the right hand side (Fig. 1) of the base it} and extending to the right of the base sufliciently to allow plenty of room for free movement of the carriage, the backing member 65 being longer than the maximum travel of the carriage and being provided with a serrated or ribbed portion 65a (Fig. 6) positioned directly behind the ends of the piercing Wires 24. The member 65 is slidable in a tube 68 which is mounted at its ends on the arms 69 pivoted at 11a in the carriage side plates, the pivots Ma and the pivot 67 being in horizontal alignment. The tube 68 is cut away as indicated at 68a (Figs. 3 and 6) and the member 65 is milled flat to correspond with the cut away portion of the tube 68 so as to form substantially flat and coplanar guiding surfaces to support the paper as in Fig. 3. The member 65 remains sta tionary and the tube 68 slides with a telescopic action over the member 65 while the carriage is traveling to right or left in normal carriage return and letter spacing operations but the serrated or ribbed portion 65a always remains stationary and in register with the ends of the piercing wires 24. When it is not desired to pierce the paper but use the typewriter for ordinary work, the assembly carried by the arms 66, 69 may be swung backwardly out of the way.

Means are also provided to disable the mechanism shown in Fig. 2 when the machine is to be used for typing alone. This means consists of a turn button 70 (Figs. 1 and 2) which is mounted on the forward or righthand end (Fig. 2) of a short rod 71 journailed in the base it) and in a suitable lug 3% which may form part of the plate 39. The rear or left-hand end of the shaft 71 is provided with a suitable cam 72 which cooperates with the free end of arm 59, the latter resting on an adjusting screw 36c supported by the plate 34 By rotating the finger piece 7%, the arm 59 will be lifted sufliciently for the lower end of the trip lever 58 to clear the upper end of the lever ss thereby preventing the release of the mechanism for operating the piercing wires. Any suitable means may be provided for yieldingly holding the cam 72 in either the position of Fig. 2 or the position in which the arm 5% is lifted.

One of the advantages of the mechanism disclosed herein over prior machines which are capable of recording code representations simultaneously with the printing of a character is that a correction may be made before the code representation is recorded since the perforating always takes place during the next succeeding character printing cycle. Quite frequently a typist will discover a misprint before the next character is typed and in the present case the typist may erase the erroneously printed character and reposition the carriage to type the correct character. A finger piece or key 43c (Fig. 5) may be mounted on bail 43 which may be pushed inwardly to release latches 40 from the levers 38 thereby erasing the stored code.

While there have been shown and described and pointed out the fundamental novel features of the invention as applied to a preferred embodiment, it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art, without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.

What is claimed is:

1. In a typewriting machine, character printing mechanism having a series of type bars, each for printing a character, means for recording code representations adjacent each printed character, a storage device for controlling the operation of the recording means, means on said type bars for controlling the storage device in accordance with a character code when a character is printed, and means to operate the recording means in accordance with the code for one character when the next character is printed.

2. In a typewriting machine, a platen, a carriage supporting said platen, means to print characters one at a time on a work sheet carried by said platen by a stepby-step spacing movement of said carriage past a printing point, a piercing station located adjacent the printing point and including a series of code piercing wires disposed in different code positions in reference to a code piercing area on said work sheet allocated to a single character, a main operating lever, code operating levers pivotally mounted on said operating lever, one end of the wires for the code positions being connected to one end of a corresponding code lever, means efiective during a printing operation to actuate said operating lever, and means set by said printing mechanism for selectively blocking the free ends of the code levers.

3. The invention set forth in claim 2 in which the set means includes a storage device operative to delay the recording of the code designations of a single character until a succeeding printing cycle for another character takes place.

4. The invention set forth in claim 2 in which actuating means for said lever includes spring means to actuate said lever rapidly in one direction followed by a rapid restoration.

5. The invention set forth in claim 2 in which the storage device includes a series of blocking levers for said code evers, latches for normally holding the blocking levers in an inefiective position, and said printing means includes code elements operative to selectively release said latches during a printing operation.

6. The invention set forth in claim 5 in which means is provided for restoring the blocking levers to latching position before another printing operation takes place.

7. In a typewn'ting machine, means to print characters along a writing line including a series of type elements movable to a common printing point, a code perforating device at the printing point including a series of code perforating members, a code storage device located at the printing point and including code storage elements set by said type elements to represent the perforation code of each character as it is printed by a type element, operating means for said perforating device controlled by said storage device, and means operative during the printing of a character after a stored code has been perforated and before another character has been printed to restore the code elements to unset position to enable said elements to be reset by the type elements.

8. The invention set forth in claim 7 in which separate means is provided to restore the set code storage elements to unset condition before the next code perforating operation to enable erroneously printed characters to be corrected before gi erforating the code corresponding thereto.

9. In a typewriting machine, a work sheet support, character printing means, code perforating means located adjacent the printing point and arranged to perforate said work sheet with code representations of said characters, main operating means including a series of code levers having operating connections to said perforating means, and a code storage device set by said printing mechanism to store the code representations of each character as it is printed and having control connections to said levers to render said levers selectively operable, and means effective during a printing operation to restore said storage device after the stored representations have been perforated in time to receive the stored representations of the character printed during such operation, said code storage device being located adjacent the printing point, said main operating means being remote from the printing point, and said operating and control connections comprising flexible operating wires.

10. In a typewriting machine, a work sheet support, character printing means, code perforating means located adjacent the printing point and arranged to perforate said work sheet with code representations of said characters, main operating means including a series of code levers having operating connections to said perforating means, and a code storage device set by said printing mechanism to store the code representations of each character as it is printed and having control connections to said levers to render said levers selectively operable, and means effective during a printing operation to restore said storage device after the stored representations have been perforated in time to receive the stored representations of the character printed during such operation, said main operating means including a spring means to actuate said levers rapidly in one direction followed by a rapid restoration of said levers and reenergization of said spring means.

11. In a typewriting machine, a work sheet support, character printing means, code perforating means located adjacent the printing point and arranged to perforate said work sheet with code representations of said characters, main operating means including a series of code levers having operating connections to said perforating means, and a code storage device set by said printing mechanism to store the code representations of each character as it is printed and having control connections to said levers to render said levers selectively operable, and means effective during a printing operation to restore said storage device after the stored representations have been perforated in time to receive the stored representations of the character printed during such operation, said storage device including a series of code storage members for selectively blocking the code levers and latches for normally holding said members in an ineffective position, said printing means including a series of code elements operable to release said latches in different combinations according to a character perforation code.

12. in a typewriting machine, a series of type elements each movable to a common printing point and each having both a printing type and a code designating element, a code storage device including a series of members set under control of the code elements to represent the characters printed when said elements move to the printing point, code perforating mechanism, and means controlled by said storage device for operating the perforating mechanism in accordance with the stored codes, said operating means being timed to actuate the code perforating mechanism to perforate the code representations of a previously printed character while the type element for a succeeding character is moving to the printing point, said operating means including means to reset the storage device before the succeeding character is printed to enable the storage device to be set in accordance with the code designating element for the type element of the succeeding character.

13. In a typewriting machine, a series of type elements each movable to a common printing point and each having both a printing type and a code designating element, a code storage device including a series of members set under control of the code elements to rep resent the characters printed when said elements move to the printing point, code perforating mechanism, means controlled by said storage device for operating the perforating mechanism in accordance with the stored codes, and means rendered effective by the movement of a type element to the printing point for setting in motion the operating means.

References Cited in the file of this patent UNITED STATES PATENTS 1,207,576 Long Dec. 5, 1916 1,278,089 Ashley et al Sept. 10, 1918 1,800,596 Bryce Apr. 14, 1931 2,364,207 Ghertman Dec. 5, 1944 2,425,490 Pitman Aug. 12, 1947 2,431,714 Sundstrand Dec. 2, 1947 

